CHAPTER 15 SERIAL INTERFACE IICA
Page 510 of 920
Figure 15 - 45 Example of Slave to Master Communication
(When 8-Clock Wait Is Selected for Master, 9-Clock Wait Is Selected for Slave) (2/3)
(2) Address ~ data ~ data
Note 1.
For releasing wait state during reception of a master device, write “FFH” to IICAn or set the WRELn bit.
Note 2.
Write data to IICAn, not setting the WRELn bit, in order to cancel a wait state during transmission by a slave device.
Remark
n = 0, 1
ACKDn
(ACK detection)
IICAn
WTIMn
(8 or 9 clock wait)
ACKEn
(ACK control)
MSTSn
(communication status)
STTn
(ST trigger)
SPTn
(SP trigger)
WRELn
(wait cancellation)
INTIICAn
(interrupt)
Bus line
TRCn
(transmit/receive)
Master side
SCLAn (bus)
(clock line)
SDAAn (bus)
(data line)
Slave side
IICAn
ACKDn
(ACK detection)
STDn
(ST detection)
SPDn
(SP detection)
WTIMn
(8 or 9 clock wait)
ACKEn
(ACK control)
MSTSn
(communication status)
WRELn
(wait cancellation)
INTIICAn
(interrupt)
TRCn
(transmit/receive)
<5>
<8>
D
1
0
D
2
7
ACK
: Wait state by master device
: Wait state by slave device
: Wait state by master and slave devices
D
1
6
D
1
5
D
1
4
D
1
3
D
1
2
D
1
1
<11>
<4>
<9>
Note 1
R
D
1
7
ACK
Note 1
<7>
<3>
<10>
Note 2
Note 2
<12>
<6>
L
H
L
H
H
L
L
H
L
L
H
Содержание RL78/G1H
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